1730–Series Checks and Adjustments
5–33
h. ADJUST – R553 for 10 cycles of subcarrier over 10 divisions ±1 minor
division. Recheck multiburst generator frequency by switching it back
to Continuous.
i. Disconnect the cable that goes to the Digital Counter and terminate the
open side of the CH–A input with a 75W end-line terminator.
8. Adjust Dual Filter Switching Phase
a. Select 2LINE SWEEP and MAG off.
b. Hold the waveform monitor FILTER button in until both the FLAT and
LPASS indicators are lit.
c. Position the tip of the sync pulse, that occurs between the two lines, so
that the switching transition is visible.
d. ADJUST – R636 (Sw. Ph) to placed the switching transition at the
center of the sync tip.
9. Adjust Magnifier Registration
a. Set the multiburst generator for High Range Multiburst.
b. Turn on the 1730-Series MAG.
c. Use the HORIZONTAL Position control to position the leading edge of
the sync pulse to the center major graticule division.
d. Turn the waveform monitor MAG off.
e. ADJUST – R661 (MAG REG) so that the leading edge of sync is at the
center major graticule division. It may be necessary to repeat this step
several times to achieve magnifier registration.
f. With the MAG off check that both ends of the trace can be positioned to
at least the center of the screen.
10. Adjust RGB Offset
a. Disconnect the multiburst signal and connect the color bar signal.
b. Set the 1730-Series SWEEP rate to 1LINE.
c. Set the HORIZONTAL Position control to mid range.
d. Connect pin 2 of the rear-panel REMOTE socket to ground.
e. Note that the color bar display compresses to 1/4 to 1/3 of its previous
length.
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